1901 L ST NW
Office (large) · Washington · 20036
At a glance
1901 L ST NW in Washington, DC is listed on the Washington, DC property roll as “Office (large)”, SSL 01170080. The roll records 246,428 sq ft of building area, a 1978 build year and an assessed value of $105,651,770. It last sold for $75,000,000 in Jan 2017. 12 active business locations at this address appear in public records.
The building's own benchmarking filing
Energy performance
From the building's own filing under its city's benchmarking ordinance, latest of 3 years on record. An ENERGY STAR score of 75 or above means the building outperforms three quarters of comparable buildings nationally. It is a self-reported figure, verified by the city only to the extent the ordinance requires.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Jan 2017 | $75,000,000 | not rated | County roll | — |
Prices are the consideration recorded in Washington, DC's public property records. Where a qualification code exists it is the assessor's judgement of whether a transfer was arm's length; transfers without one appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 12 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| FORTUS-Excellence in Design-CallisonRTKL-Quinn Evans JV | — | Jul 2026 | DC business licence | folio match · high |
| Arcadis-ZAPATA JV | — | Jul 2026 | DC business licence | folio match · high |
| COLONIAL PARKING INC.via COLONIAL PARKING, INC. | 100 | Jun 2026 | DC business licence | folio match · high |
| RTKL/SSR JV | — | May 2026 | DC business licence | folio match · high |
| Arcadis & Huitt-Zollars JV | — | May 2026 | DC business licence | folio match · high |
| Arcadis Pond JV | — | May 2026 | DC business licence | folio match · high |
| Arcadis Miller-Remick JV | — | Mar 2026 | DC business licence | folio match · high |
| Arcadis GFT JV | — | Mar 2026 | DC business licence | folio match · high |
| Arcadis-Chloeta JV | — | Mar 2026 | DC business licence | folio match · high |
| MOI Inc. | — | Mar 2025 | DC business licence | folio match · high |
| XENOPHON STRATEGIES, INCORPORATED | — | Jan 2025 | DC business licence | folio match · high |
| International Association of Women Judges | — | Nov 2024 | DC business licence | folio match · high |
Washington, DC assessment roll
Parcel record
| Field | Value |
|---|---|
| SSL | 01170080 |
| Site address | 1901 L ST NW |
| Land use (DOR) | 052 — Office (large) |
| Building area (actual) | 246,428 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | 18,490 sq ft |
| Year built | 1978 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $105,651,770 |
Recorded owner (assessment roll)
TMG 1901 L STREET LLC
Owner mailing address: 3 BETHESDA METRO CTR STE 1400 # 1400, BETHESDA, MD, 20814
2 Washington office properties share this owner mailing address →
Commercial property is usually held one building per entity; a shared mailbox is how the roll reveals a portfolio. It is evidence of common ownership, not proof.
Location
- Address
- 1901 L ST NW
- City
- Washington
- ZIP
- 20036
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1901 L ST NW compare with other Washington office buildings?
At 246,428 sq ft, 1901 L ST NW is about twice the size of the average office building on the Washington, DC roll, which comes to 120,450 sq ft across 1,761 buildings.
Its assessed value works out to $429 per square foot of building area, against $370 across all office floor area on the roll.
The last recorded sale priced it at $304 per square foot.
Does the owner of 1901 L ST NW hold other Washington office property?
2 Washington office properties (2 parcels, 604.4K sq ft) are recorded to 2 owner entities sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What has happened at 1901 L ST NW recently?
1 recorded transfer is on file for this parcel, the latest dated Jan 2017.
The building files energy-benchmarking disclosures — 3 report years are matched to this parcel.
What does “Office (large)” mean for this parcel?
The Washington, DC roll classifies SSL 01170080 as “Office (large)” (use code 052). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 1901 L ST NW?
The recorded owner on the Washington, DC assessment roll (current) is TMG 1901 L STREET LLC. Owner mailing address on file: 3 BETHESDA METRO CTR STE 1400 # 1400, BETHESDA, MD, 20814.
What companies have offices at 1901 L ST NW?
12 active business locations at this building appear in Washington, DC public records, including FORTUS-Excellence in Design-CallisonRTKL-Quinn Evans JV, Arcadis-ZAPATA JV, COLONIAL PARKING INC., RTKL/SSR JV, Arcadis & Huitt-Zollars JV. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1901 L ST NW?
The Washington, DC roll records 246,428 sq ft of building area, a build year of 1978. It sits on a 18,490 sq ft lot.
What is the assessed value of 1901 L ST NW?
$105,651,770 on the Washington, DC roll. Assessed values are taxable-roll figures, not market prices.
When did 1901 L ST NW last sell?
The last recorded transfer was in Jan 2017 for $75,000,000 ($304 per square foot).
What is the SSL for 1901 L ST NW?
SSL 01170080, site address 1901 L ST NW, Washington. It is the key to look the parcel up in the Integrated Tax System public extract (Washington, DC).
More around 1901 L ST NW
- Washington, DC office buildings· 1,761 buildings
- TMG 1333 NEW HAMPSHIRE AVE LLC· 2 properties
- FORTUS-Excellence in Design-CallisonRTKL-Quinn Evans JV· tenant on record
- Arcadis-ZAPATA JV· tenant on record
- COLONIAL PARKING INC.· suite 100
- RTKL/SSR JV· tenant on record
- Federal office leases in DC
- Office census — all metros
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Washington, DC — Integrated Tax System public extract (owner names, mailing addresses, assessments), CAMA commercial and daily sales tables, Basic Business Licenses (suite-level premises; the universal catch-all licence was repealed Oct 2025, thinning the roll thereafter), and DOEE energy benchmarking.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
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Dataset updated . Source: Washington, DC assessment roll, SSL 01170080.
About this data
Source: Integrated Tax System public extract (Washington, DC), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “1901 L ST NW, Washington, DC (SSL 01170080)”, https://buildingcensus.com/offices/dc/office-building-6d33f53e (data as of September 20, 2026).